From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755457Ab0IMU5U (ORCPT ); Mon, 13 Sep 2010 16:57:20 -0400 Received: from mga09.intel.com ([134.134.136.24]:6906 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751018Ab0IMU5T convert rfc822-to-8bit (ORCPT ); Mon, 13 Sep 2010 16:57:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.56,360,1280732400"; d="scan'208";a="656871934" From: "Luck, Tony" To: Andi Kleen , Peter Zijlstra CC: "perfmon2-devel@lists.sf.net" , "eranian@gmail.com" , "fweisbec@gmail.com" , "linux-kernel@vger.kernel.org" , "eranian@google.com" , "paulus@samba.org" , "Metzger, Markus T" , "mingo@elte.hu" , "davem@davemloft.net" Date: Mon, 13 Sep 2010 13:57:17 -0700 Subject: RE: [perfmon2] [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation Thread-Topic: [perfmon2] [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation Thread-Index: ActThYsHDRBiH3WsR76ssnDeUI0FVAAAEM5g Message-ID: <987664A83D2D224EAE907B061CE93D53015DC52F43@orsmsx505.amr.corp.intel.com> References: <4c8e3c0c.12d1d80a.73d9.ffffcf21@mx.google.com> <877hip4et0.fsf@basil.nowhere.org> <1284407360.2275.431.camel@laptop> <20100913225137.042ff889@basil.nowhere.org> In-Reply-To: <20100913225137.042ff889@basil.nowhere.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I am not aware of any real technical issues, except that > it needs to be done for both 32bit and 64bit. Some good documentation on when you need vmalloc_sync_all(), and why most places don't need it would help to avoid a surge of patches spraying calls to it all over the kernel. -Tony